Hi
It is 2*2 SMP system, x86_64.
INFO: task async/0:1073 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
async/0 D 0000000000000000 6312 1073 2
ffff88007ed91cd0 0000000000000046 0000000000000006 0000000000000000
ffff88007ed91c40 000000000000d988 00000000001d2040 0000000000000000
ffff88007f5c1300 ffff88007f7d8000 ffff88007f5c1690 0000000000000000
Call Trace:
[<ffffffff802832ed>] ? trace_hardirqs_on_caller+0x18d/0x1f0
[<ffffffff80283370>] ? trace_hardirqs_on+0x20/0x40
[<ffffffff806d53e6>] schedule+0x26/0x60
[<ffffffff80275825>] async_synchronize_cookie_domain+0x85/0x160
[<ffffffff8026cd70>] ? autoremove_wake_function+0x0/0x60
[<ffffffff80275923>] async_synchronize_cookie+0x23/0x40
[<ffffffff8027596c>] async_synchronize_full+0x2c/0x70
[<ffffffff8058a0c8>] scsi_complete_async_scans+0x88/0x140
[<ffffffff8058c985>] __scsi_add_device+0x105/0x140
[<ffffffff805aefb2>] ata_scsi_scan_host+0xc2/0x1f0
[<ffffffff805aafd6>] async_port_probe+0xc6/0x110
[<ffffffff806d8fa5>] ? _spin_unlock_irqrestore+0x55/0xb0
[<ffffffff8027563a>] async_thread+0x11a/0x280
[<ffffffff802460a0>] ? default_wake_function+0x0/0x40
[<ffffffff80275520>] ? async_thread+0x0/0x280
[<ffffffff8026c8dc>] kthread+0x5c/0xb0
[<ffffffff8020cafa>] child_rip+0xa/0x20
[<ffffffff8020c4c0>] ? restore_args+0x0/0x30
[<ffffffff8026c880>] ? kthread+0x0/0xb0
[<ffffffff8020caf0>] ? child_rip+0x0/0x20
1 lock held by async/0/1073:
#0: (&shost->scan_mutex){+.+.+.}, at: [<ffffffff8058c94a>]
__scsi_add_device+0xca/0x140
INFO: task async/1:1076 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
async/1 D 0000000000000001 6552 1076 2
ffff88007ed97dc0 0000000000000046 ffff88007ed97d00 ffffffff8027fb01
00000000000001d2 000000000000d988 00000000001d2040 0000000000000002
ffff88007ed98000 ffff88007f7db900 ffff88007ed98390 000000027ed97eb0
Call Trace:
[<ffffffff8027fb01>] ? put_lock_stats+0x21/0x60
[<ffffffff802832ed>] ? trace_hardirqs_on_caller+0x18d/0x1f0
[<ffffffff80283370>] ? trace_hardirqs_on+0x20/0x40
[<ffffffff806d53e6>] schedule+0x26/0x60
[<ffffffff80275825>] async_synchronize_cookie_domain+0x85/0x160
[<ffffffff8026cd70>] ? autoremove_wake_function+0x0/0x60
[<ffffffff80275923>] async_synchronize_cookie+0x23/0x40
[<ffffffff805ab000>] async_port_probe+0xf0/0x110
[<ffffffff806d8fa5>] ? _spin_unlock_irqrestore+0x55/0xb0
[<ffffffff8027563a>] async_thread+0x11a/0x280
[<ffffffff802460a0>] ? default_wake_function+0x0/0x40
[<ffffffff80275520>] ? async_thread+0x0/0x280
[<ffffffff8026c8dc>] kthread+0x5c/0xb0
[<ffffffff8020cafa>] child_rip+0xa/0x20
[<ffffffff8020c4c0>] ? restore_args+0x0/0x30
[<ffffffff8026c880>] ? kthread+0x0/0xb0
[<ffffffff8020caf0>] ? child_rip+0x0/0x20
no locks held by async/1/1076.
INFO: task swapper:1 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
swapper D 0000000000000000 3336 1 0
ffff88007f427dd0 0000000000000046 ffff88007f427d10 ffffffff8027fb01
0000000000000145 000000000000d988 00000000001d2040 0000000000000000
ffff88007f448000 ffffffff808744a0 ffff88007f448390 00000000808c9fe0
Call Trace:
[<ffffffff8027fb01>] ? put_lock_stats+0x21/0x60
[<ffffffff802832ed>] ? trace_hardirqs_on_caller+0x18d/0x1f0
[<ffffffff80283370>] ? trace_hardirqs_on+0x20/0x40
[<ffffffff806d53e6>] schedule+0x26/0x60
[<ffffffff80275825>] async_synchronize_cookie_domain+0x85/0x160
[<ffffffff8026cd70>] ? autoremove_wake_function+0x0/0x60
[<ffffffff80275923>] async_synchronize_cookie+0x23/0x40
[<ffffffff8027596c>] async_synchronize_full+0x2c/0x70
[<ffffffff805758bf>] wait_for_device_probe+0x8f/0xc0
[<ffffffff8026cd70>] ? autoremove_wake_function+0x0/0x60
[<ffffffff808d865f>] prepare_namespace+0x2a/0x179
[<ffffffff808d78c6>] kernel_init+0x1e9/0x250
[<ffffffff8020cafa>] child_rip+0xa/0x20
[<ffffffff8020c4c0>] ? restore_args+0x0/0x30
[<ffffffff808d76dd>] ? kernel_init+0x0/0x250
[<ffffffff8020caf0>] ? child_rip+0x0/0x20
no locks held by swapper/1.
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